6533b838fe1ef96bd12a485b
RESEARCH PRODUCT
Chandra Observation of the Dipping Source XB 1254-690
T. Di SalvoA. D' Ai'G. LavagettoN. R. RobbaR. Iariasubject
PhysicsAbsorption spectroscopyTurbulenceAstrophysics::High Energy Astrophysical PhenomenaAstrophysics (astro-ph)FOS: Physical sciencesAstronomy and AstrophysicsAstrophysicsRadiusEPICAstrophysicsaccretion accretion diskBulk motionLine widthstars : individual : XB 1254-690stars : neutronIonline : identificationAccretion discSpace and Planetary ScienceX-rays : starindividual : XB 1254-690; stars : neutron; X-rays : stars; X-rays : binaries; line : identification [accretion accretion disks; stars]X-rays : binariedescription
We present the results of a 53 ks long Chandra observation of the dipping source XB 1254--690. During the observation neither bursts or dips were observed. From the zero-order image we estimated the precise X-ray coordinates of the source with a 90% uncertainty of 0.6\arcsec. Since the lightcurve did not show any significant variability, we extracted the spectrum corresponding to the whole observation. We confirmed the presence of the \ion{Fe}{xxvi} K$_\alpha$ absorption lines with a larger accuracy with respect to the previous XMM EPIC pn observation. Assuming that the line width were due to a bulk motion or a turbulence associated to the coronal activity, we estimate that the lines were produced in a photoionized absorber between the coronal radius and the outer edge of the accretion disk.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2006-12-20 |